3M Littmann 3200 Guia De Inicio Rapido página 7

5. Select Filter
This electronic stethoscope allows the user to select between three different digital frequency fi lters to better emphasize the
specifi c patient sounds of interest.
• The Bellmode amplifi es sounds from 20 - 1000Hz, but emphasizes lower frequency sounds between 20 - 200Hz.
• The Diaphragm mode amplifi es sounds from 20 - 2000Hz, but emphasizes the sounds between 100 - 500Hz.
• The Extended Range mode amplifi es sounds from 20 - 2000Hz similar to the Diaphragm Mode, but provides more
low frequency response between 50 - 500Hz.
The default setting is the Diaphragm fi lter. Instructions for changing the default fi lter setting are given in the Custom
Confi guration section below.
To select fi lter: Depress and release fi lter button (as shown in diagram) until desired fi lter mode appears on the LCD display.
Extended
Range Mode
Icon
6. Adjust Sound Amplifi cation Level
The Model 3200 sound level can be amplifi ed in 8 increments up to 24X amplifi cation of a non-electronic (cardiology-level)
stethoscope. Level 1 is equal to a non-electronic stethoscope. Level 9 is equal to 24X amplifi cation of a non-electronic
stethoscope. The greater the amplifi cation, the more bars you will see.
A default start-up amplifi cation level can be set using the instructions provided in the Custom Confi guration section below.
The default setting is marked by the box on the vertical bar shown in the volume icon in the LCD display. The illustration
shows a default amplifi cation setting at Level 3.
• Increase Amplifi cation: Press ( + ) button until desired amplifi cation level is achieved
• Decrease Amplifi cation: Press ( - ) button until desired amplifi cation level is achieved
Bell
Diaphragm
Mode
Mode
Icon
Icon
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7. Monitor Patient Heart Rate
The Model 3200 detects and displays an acoustic-based heart rate when presented with consistent heart sounds (heart rate
variation < 10%). It takes fi ve seconds to compute the initial heart rate and updates are provided every two seconds. The
heart rate will then be displayed for 10 seconds after removal of the chestpiece from the patient. Prior to the initial reading,
the display shows two dashes (--). For heart rates outside a range of 30-199 bpm, the display will also show two dashes (--).
The acoustic-based heart rate display functions best when the Model 3200 is placed near the apex of the patient's heart and
can be monitored while using any fi lter mode and/or volume level. If the heart rate changes from consistent to inconsistent or
if there is excessive ambient noise, patient movement or lung sounds during auscultation, the heart rate display number will
display two dashes (--).
8. Monitor Battery Life
Battery life is indicated by an icon in the LCD display.
The Model 3200 comes with a AA Alkaline battery. Battery will provide approximately 50-60 hours of continuous use,
depending on the frequency of Bluetooth data transfers. In a typical clinical setting, this represents about three months of
use.
As the battery life depletes, the icon will change as follows:
The battery icon begins to blink when only a few hours of battery capacity remains.
CAUTION: When the battery is completely depleted the scope becomes inoperable. No sound will be transmitted without
a functioning battery.
IMPORTANT! NiMH (rechargeable) and Lithium batteries may also be used in the Model 3200. However, battery type must be
specifi ed to ensure a reliable battery life indication (see Custom Confi guration section below).
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